Silence minor warnings

Signed-off-by: Ralph Castain <rhc@open-mpi.org>

orte/mca/oob/tcp/oob_tcp_connection.c

@@ -888,7 +888,7 @@ int mca_oob_tcp_peer_recv_connect_ack(mca_oob_tcp_peer_t* pr,
     }
 
     /* check that this is from a matching version */
-    version = (char*)((void*)msg + offset);
+    version = (char*)((char*)msg + offset);
     offset += strlen(version) + 1;
     if (0 != strcmp(version, orte_version_string)) {
         opal_output(0, "%s tcp_peer_recv_connect_ack: "
@@ -908,7 +908,7 @@ int mca_oob_tcp_peer_recv_connect_ack(mca_oob_tcp_peer_t* pr,
                         ORTE_NAME_PRINT(&peer->name));
 
     /* check security token */
-    cred = (char*)((void*)msg + offset);
+    cred = (char*)((char*)msg + offset);
     credsize = hdr.nbytes - offset;
     if (OPAL_SUCCESS != (rc = opal_sec.authenticate(cred, credsize, &peer->auth_method))) {
         char *hostname;